[INFO] fetching crate fmlrc 0.1.8...
[INFO] checking fmlrc-0.1.8 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate fmlrc 0.1.8 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate fmlrc 0.1.8
[INFO] finished tweaking crates.io crate fmlrc 0.1.8
[INFO] tweaked toml for crates.io crate fmlrc 0.1.8 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate fmlrc 0.1.8 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate fmlrc 0.1.8 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b7b0c3368cbd3ee06e3e17de9b8670f3e31762a80765c094bb4d663801ae8dbf
[INFO] running `Command { std: "docker" "start" "-a" "b7b0c3368cbd3ee06e3e17de9b8670f3e31762a80765c094bb4d663801ae8dbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b7b0c3368cbd3ee06e3e17de9b8670f3e31762a80765c094bb4d663801ae8dbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7b0c3368cbd3ee06e3e17de9b8670f3e31762a80765c094bb4d663801ae8dbf", kill_on_drop: false }`
[INFO] [stdout] b7b0c3368cbd3ee06e3e17de9b8670f3e31762a80765c094bb4d663801ae8dbf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid -Dunmustuse_in_always_ok" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 18f81c2f252d205d00de6eac629ff2c283b3b2815b4e726184f04488a2c471f0
[INFO] running `Command { std: "docker" "start" "-a" "18f81c2f252d205d00de6eac629ff2c283b3b2815b4e726184f04488a2c471f0", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.117
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling pkg-config v0.3.24
[INFO] [stderr]    Compiling crossbeam-utils v0.8.6
[INFO] [stderr]    Compiling semver v1.0.4
[INFO] [stderr]    Compiling semver v0.1.20
[INFO] [stderr]    Compiling rustversion v1.0.6
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling feature-probe v0.1.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling serde_json v1.0.78
[INFO] [stderr]    Compiling crc32fast v1.3.1
[INFO] [stderr]    Compiling bv v0.11.1
[INFO] [stderr]    Compiling rustc_version v0.1.7
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.6
[INFO] [stderr]    Compiling ndarray v0.13.1
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]     Checking matrixmultiply v0.2.4
[INFO] [stderr]    Compiling newtype_derive v0.1.6
[INFO] [stderr]    Compiling bio v0.31.0
[INFO] [stderr]     Checking bytecount v0.6.2
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking ordermap v0.3.5
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[INFO] [stderr]    Compiling rustc_version v0.4.0
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[INFO] [stderr]    Compiling lzma-sys v0.1.17
[INFO] [stderr]    Compiling bzip2-sys v0.1.11+1.0.8
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[INFO] [stderr]     Checking num_cpus v1.13.1
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[INFO] [stderr]     Checking rayon-core v1.9.1
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[INFO] [stderr]     Checking rand v0.7.3
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[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking needletail v0.4.1
[INFO] [stderr]     Checking libmath v0.1.4
[INFO] [stderr]     Checking rayon v1.5.1
[INFO] [stderr]     Checking criterion-plot v0.4.4
[INFO] [stderr]     Checking statrs v0.12.0
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling derive-new v0.5.9
[INFO] [stderr]    Compiling snafu-derive v0.6.10
[INFO] [stderr]    Compiling strum_macros v0.23.1
[INFO] [stderr]    Compiling strum_macros v0.18.0
[INFO] [stderr]    Compiling getset v0.0.9
[INFO] [stderr]     Checking thiserror v1.0.30
[INFO] [stderr]     Checking snafu v0.6.10
[INFO] [stderr]     Checking bio-types v0.12.1
[INFO] [stderr]     Checking serde v1.0.136
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking multimap v0.6.0
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking criterion v0.3.5
[INFO] [stderr]     Checking fmlrc v0.1.8 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/bin/fmlrc2-convert.rs:41:13
[INFO] [stdout]    |
[INFO] [stdout] 41 |     in_fn = value_t!(matches.value_of("in_fn"), String).unwrap_or(in_fn);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]    = note: this error originates in the macro `value_t` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fmlrc` (bin "fmlrc2-convert") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "18f81c2f252d205d00de6eac629ff2c283b3b2815b4e726184f04488a2c471f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "18f81c2f252d205d00de6eac629ff2c283b3b2815b4e726184f04488a2c471f0", kill_on_drop: false }`
[INFO] [stdout] 18f81c2f252d205d00de6eac629ff2c283b3b2815b4e726184f04488a2c471f0